Autothrust Blue
“If you jump on my shift, that’s just rude, man.”
The joke was that they're already up.Simply placing your hand on the flap lever at the appropriate time usually works without saying anything and bruising no one's ego.
I do know of a person that did an entire 1 hour flight and then when they went to put the flaps in the approach position found that the invisible person in the right seat apparently had already lowered them.